osfmk/i386/cpu_data.h

   1 /*
   2  * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  *
  31  */
  32
  33 #ifndef I386_CPU_DATA
  34 #define I386_CPU_DATA
  35
  36 #include <mach_assert.h>
  37
  38 #include <kern/assert.h>
  39 #include <kern/kern_types.h>
  40 #include <kern/queue.h>
  41 #include <kern/processor.h>
  42 #include <kern/pms.h>
  43 #include <pexpert/pexpert.h>
  44 #include <mach/i386/thread_status.h>
  45 #include <mach/i386/vm_param.h>
  46 #include <i386/locks.h>
  47 #include <i386/rtclock_protos.h>
  48 #include <i386/pmCPU.h>
  49 #include <i386/cpu_topology.h>
  50
  51 #if CONFIG_VMX
  52 #include <i386/vmx/vmx_cpu.h>
  53 #endif
  54
  55 #include <machine/pal_routines.h>
  56
  57 /*
  58  * Data structures referenced (anonymously) from per-cpu data:
  59  */
  60 struct cpu_cons_buffer;
  61 struct cpu_desc_table;
  62 struct mca_state;
  63 struct prngContext;
  64
  65 /*
  66  * Data structures embedded in per-cpu data:
  67  */
  68 typedef struct rtclock_timer {
  69         mpqueue_head_t          queue;
  70         uint64_t                deadline;
  71         uint64_t                when_set;
  72         boolean_t               has_expired;
  73 } rtclock_timer_t;
  74
  75
  76 typedef struct {
  77         struct x86_64_tss       *cdi_ktss;
  78         struct __attribute__((packed)) {
  79                 uint16_t size;
  80                 void *ptr;
  81         } cdi_gdt, cdi_idt;
  82         struct fake_descriptor  *cdi_ldt;
  83         vm_offset_t             cdi_sstk;
  84 } cpu_desc_index_t;
  85
  86 typedef enum {
  87         TASK_MAP_32BIT,                 /* 32-bit user, compatibility mode */
  88         TASK_MAP_64BIT,                 /* 64-bit user thread, shared space */
  89 } task_map_t;
  90
  91
  92 /*
  93  * This structure is used on entry into the (uber-)kernel on syscall from
  94  * a 64-bit user. It contains the address of the machine state save area
  95  * for the current thread and a temporary place to save the user's rsp
  96  * before loading this address into rsp.
  97  */
  98 typedef struct {
  99         addr64_t        cu_isf;         /* thread->pcb->iss.isf */
 100         uint64_t        cu_tmp;         /* temporary scratch */
 101         addr64_t        cu_user_gs_base;
 102 } cpu_uber_t;
 103
 104 typedef uint16_t        pcid_t;
 105 typedef uint8_t         pcid_ref_t;
 106
 107 #define CPU_RTIME_BINS (12)
 108 #define CPU_ITIME_BINS (CPU_RTIME_BINS)
 109
 110 /*
 111  * Per-cpu data.
 112  *
 113  * Each processor has a per-cpu data area which is dereferenced through the
 114  * current_cpu_datap() macro. For speed, the %gs segment is based here, and
 115  * using this, inlines provides single-instruction access to frequently used
 116  * members - such as get_cpu_number()/cpu_number(), and get_active_thread()/
 117  * current_thread().
 118  *
 119  * Cpu data owned by another processor can be accessed using the
 120  * cpu_datap(cpu_number) macro which uses the cpu_data_ptr[] array of per-cpu
 121  * pointers.
 122  */
 123 typedef struct cpu_data
 124 {
 125         struct pal_cpu_data     cpu_pal_data;           /* PAL-specific data */
 126 #define                         cpu_pd cpu_pal_data     /* convenience alias */
 127         struct cpu_data         *cpu_this;              /* pointer to myself */
 128         thread_t                cpu_active_thread;
 129         thread_t                cpu_nthread;
 130         volatile int            cpu_preemption_level;
 131         int                     cpu_number;             /* Logical CPU */
 132         void                    *cpu_int_state;         /* interrupt state */
 133         vm_offset_t             cpu_active_stack;       /* kernel stack base */
 134         vm_offset_t             cpu_kernel_stack;       /* kernel stack top */
 135         vm_offset_t             cpu_int_stack_top;
 136         int                     cpu_interrupt_level;
 137         int                     cpu_phys_number;        /* Physical CPU */
 138         cpu_id_t                cpu_id;                 /* Platform Expert */
 139         volatile int            cpu_signals;            /* IPI events */
 140         volatile int            cpu_prior_signals;      /* Last set of events,
 141                                                          * debugging
 142                                                          */
 143         ast_t                   cpu_pending_ast;
 144         volatile int            cpu_running;
 145         boolean_t               cpu_fixed_pmcs_enabled;
 146         rtclock_timer_t         rtclock_timer;
 147         volatile addr64_t       cpu_active_cr3 __attribute((aligned(64)));
 148         union {
 149                 volatile uint32_t cpu_tlb_invalid;
 150                 struct {
 151                         volatile uint16_t cpu_tlb_invalid_local;
 152                         volatile uint16_t cpu_tlb_invalid_global;
 153                 };
 154         };
 155         volatile task_map_t     cpu_task_map;
 156         volatile addr64_t       cpu_task_cr3;
 157         addr64_t                cpu_kernel_cr3;
 158         cpu_uber_t              cpu_uber;
 159         void                    *cpu_chud;
 160         void                    *cpu_console_buf;
 161         struct x86_lcpu         lcpu;
 162         struct processor        *cpu_processor;
 163 #if NCOPY_WINDOWS > 0
 164         struct cpu_pmap         *cpu_pmap;
 165 #endif
 166         struct cpu_desc_table   *cpu_desc_tablep;
 167         struct fake_descriptor  *cpu_ldtp;
 168         cpu_desc_index_t        cpu_desc_index;
 169         int                     cpu_ldt;
 170 #if NCOPY_WINDOWS > 0
 171         vm_offset_t             cpu_copywindow_base;
 172         uint64_t                *cpu_copywindow_pdp;
 173
 174         vm_offset_t             cpu_physwindow_base;
 175         uint64_t                *cpu_physwindow_ptep;
 176 #endif
 177
 178 #define HWINTCNT_SIZE 256
 179         uint32_t                cpu_hwIntCnt[HWINTCNT_SIZE];    /* Interrupt counts */
 180         uint64_t                cpu_hwIntpexits[HWINTCNT_SIZE];
 181         uint64_t                cpu_hwIntcexits[HWINTCNT_SIZE];
 182         uint64_t                cpu_dr7; /* debug control register */
 183         uint64_t                cpu_int_event_time;     /* intr entry/exit time */
 184         pal_rtc_nanotime_t      *cpu_nanotime;          /* Nanotime info */
 185 #if     CONFIG_COUNTERS
 186         thread_t                csw_old_thread;
 187         thread_t                csw_new_thread;
 188 #endif /* CONFIG COUNTERS */
 189 #if KPC
 190         /* double-buffered performance counter data */
 191         uint64_t                *cpu_kpc_buf[2];
 192         /* PMC shadow and reload value buffers */
 193         uint64_t                *cpu_kpc_shadow;
 194         uint64_t                *cpu_kpc_reload;
 195 #endif
 196         uint32_t                cpu_pmap_pcid_enabled;
 197         pcid_t                  cpu_active_pcid;
 198         pcid_t                  cpu_last_pcid;
 199         volatile pcid_ref_t     *cpu_pmap_pcid_coherentp;
 200         volatile pcid_ref_t     *cpu_pmap_pcid_coherentp_kernel;
 201 #define PMAP_PCID_MAX_PCID      (0x1000)
 202         pcid_t                  cpu_pcid_free_hint;
 203         pcid_ref_t              cpu_pcid_refcounts[PMAP_PCID_MAX_PCID];
 204         pmap_t                  cpu_pcid_last_pmap_dispatched[PMAP_PCID_MAX_PCID];
 205 #ifdef  PCID_STATS
 206         uint64_t                cpu_pmap_pcid_flushes;
 207         uint64_t                cpu_pmap_pcid_preserves;
 208 #endif
 209         uint64_t                cpu_aperf;
 210         uint64_t                cpu_mperf;
 211         uint64_t                cpu_c3res;
 212         uint64_t                cpu_c6res;
 213         uint64_t                cpu_c7res;
 214         uint64_t                cpu_itime_total;
 215         uint64_t                cpu_rtime_total;
 216         uint64_t                cpu_ixtime;
 217         uint64_t                cpu_idle_exits;
 218         uint64_t                cpu_rtimes[CPU_RTIME_BINS];
 219         uint64_t                cpu_itimes[CPU_ITIME_BINS];
 220         uint64_t                cpu_cur_insns;
 221         uint64_t                cpu_cur_ucc;
 222         uint64_t                cpu_cur_urc;
 223         uint64_t                cpu_gpmcs[4];
 224         uint64_t                cpu_max_observed_int_latency;
 225         int                     cpu_max_observed_int_latency_vector;
 226         volatile boolean_t      cpu_NMI_acknowledged;
 227         uint64_t                debugger_entry_time;
 228         uint64_t                debugger_ipi_time;
 229         /* A separate nested interrupt stack flag, to account
 230          * for non-nested interrupts arriving while on the interrupt stack
 231          * Currently only occurs when AICPM enables interrupts on the
 232          * interrupt stack during processor offlining.
 233          */
 234         uint32_t                cpu_nested_istack;
 235         uint32_t                cpu_nested_istack_events;
 236         x86_saved_state64_t     *cpu_fatal_trap_state;
 237         x86_saved_state64_t     *cpu_post_fatal_trap_state;
 238 #if CONFIG_VMX
 239         vmx_cpu_t               cpu_vmx;                /* wonderful world of virtualization */
 240 #endif
 241 #if CONFIG_MCA
 242         struct mca_state        *cpu_mca_state;         /* State at MC fault */
 243 #endif
 244         struct prngContext      *cpu_prng;              /* PRNG's context */
 245         int                     cpu_type;
 246         int                     cpu_subtype;
 247         int                     cpu_threadtype;
 248         boolean_t               cpu_iflag;
 249         boolean_t               cpu_boot_complete;
 250         int                     cpu_hibernate;
 251 } cpu_data_t;
 252
 253 extern cpu_data_t       *cpu_data_ptr[];
 254
 255 /* Macro to generate inline bodies to retrieve per-cpu data fields. */
 256 #if defined(__clang__)
 257 #define GS_RELATIVE volatile __attribute__((address_space(256)))
 258 #ifndef offsetof
 259 #define offsetof(TYPE,MEMBER) __builtin_offsetof(TYPE,MEMBER)
 260 #endif
 261
 262 #define CPU_DATA_GET(member,type)                                                                               \
 263         cpu_data_t GS_RELATIVE *cpu_data =                                                      \
 264                 (cpu_data_t GS_RELATIVE *)0UL;                                                                  \
 265         type ret;                                                                                                                       \
 266         ret = cpu_data->member;                                                                                         \
 267         return ret;
 268
 269 #define CPU_DATA_GET_INDEX(member,index,type)                                                   \
 270         cpu_data_t GS_RELATIVE *cpu_data =                                                      \
 271                 (cpu_data_t GS_RELATIVE *)0UL;                                                                  \
 272         type ret;                                                                                                                       \
 273         ret = cpu_data->member[index];                                                                          \
 274         return ret;
 275
 276 #define CPU_DATA_SET(member,value)                                                                              \
 277         cpu_data_t GS_RELATIVE *cpu_data =                                                      \
 278                 (cpu_data_t GS_RELATIVE *)0UL;                                                                  \
 279         cpu_data->member = value;
 280
 281 #define CPU_DATA_XCHG(member,value,type)                                                                \
 282         cpu_data_t GS_RELATIVE *cpu_data =                                                      \
 283                 (cpu_data_t GS_RELATIVE *)0UL;                                                                  \
 284         type ret;                                                                                                                       \
 285         ret = cpu_data->member;                                                                                         \
 286         cpu_data->member = value;                                                                                       \
 287         return ret;
 288
 289 #else /* !defined(__clang__) */
 290
 291 #ifndef offsetof
 292 #define offsetof(TYPE,MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 293 #endif /* offsetof */
 294 #define CPU_DATA_GET(member,type)                                       \
 295         type ret;                                                       \
 296         __asm__ volatile ("mov %%gs:%P1,%0"                             \
 297                 : "=r" (ret)                                            \
 298                 : "i" (offsetof(cpu_data_t,member)));                   \
 299         return ret;
 300
 301 #define CPU_DATA_GET_INDEX(member,index,type)   \
 302         type ret;                                                       \
 303         __asm__ volatile ("mov %%gs:(%1),%0"                            \
 304                 : "=r" (ret)                                            \
 305                 : "r" (offsetof(cpu_data_t,member[index])));                    \
 306         return ret;
 307
 308 #define CPU_DATA_SET(member,value)                                      \
 309         __asm__ volatile ("mov %0,%%gs:%P1"                             \
 310                 :                                                       \
 311                 : "r" (value), "i" (offsetof(cpu_data_t,member)));
 312
 313 #define CPU_DATA_XCHG(member,value,type)                                \
 314         type ret;                                                       \
 315         __asm__ volatile ("xchg %0,%%gs:%P1"                            \
 316                 : "=r" (ret)                                            \
 317                 : "i" (offsetof(cpu_data_t,member)), "0" (value));      \
 318         return ret;
 319
 320 #endif /* !defined(__clang__) */
 321
 322 /*
 323  * Everyone within the osfmk part of the kernel can use the fast
 324  * inline versions of these routines.  Everyone outside, must call
 325  * the real thing,
 326  */
 327 static inline thread_t
 328 get_active_thread(void)
 329 {
 330         CPU_DATA_GET(cpu_active_thread,thread_t)
 331 }
 332 #define current_thread_fast()           get_active_thread()
 333 #define current_thread()                current_thread_fast()
 334
 335 #define cpu_mode_is64bit()              TRUE
 336
 337 static inline int
 338 get_preemption_level(void)
 339 {
 340         CPU_DATA_GET(cpu_preemption_level,int)
 341 }
 342 static inline int
 343 get_interrupt_level(void)
 344 {
 345         CPU_DATA_GET(cpu_interrupt_level,int)
 346 }
 347 static inline int
 348 get_cpu_number(void)
 349 {
 350         CPU_DATA_GET(cpu_number,int)
 351 }
 352 static inline int
 353 get_cpu_phys_number(void)
 354 {
 355         CPU_DATA_GET(cpu_phys_number,int)
 356 }
 357
 358
 359 static inline void
 360 disable_preemption(void)
 361 {
 362 #if defined(__clang__)
 363         cpu_data_t GS_RELATIVE *cpu_data = (cpu_data_t GS_RELATIVE *)0UL;
 364         cpu_data->cpu_preemption_level++;
 365 #else
 366         __asm__ volatile ("incl %%gs:%P0"
 367                         :
 368                         : "i" (offsetof(cpu_data_t, cpu_preemption_level)));
 369 #endif
 370 }
 371
 372 static inline void
 373 enable_preemption(void)
 374 {
 375         assert(get_preemption_level() > 0);
 376
 377 #if defined(__clang__)
 378         cpu_data_t GS_RELATIVE *cpu_data = (cpu_data_t GS_RELATIVE *)0UL;
 379         if (0 == --cpu_data->cpu_preemption_level)
 380                 kernel_preempt_check();
 381 #else
 382         __asm__ volatile ("decl %%gs:%P0                \n\t"
 383                           "jne 1f                       \n\t"
 384                           "call _kernel_preempt_check   \n\t"
 385                           "1:"
 386                         : /* no outputs */
 387                         : "i" (offsetof(cpu_data_t, cpu_preemption_level))
 388                         : "eax", "ecx", "edx", "cc", "memory");
 389 #endif
 390 }
 391
 392 static inline void
 393 enable_preemption_no_check(void)
 394 {
 395         assert(get_preemption_level() > 0);
 396
 397 #if defined(__clang__)
 398         cpu_data_t GS_RELATIVE *cpu_data = (cpu_data_t GS_RELATIVE *)0UL;
 399         cpu_data->cpu_preemption_level--;
 400 #else
 401         __asm__ volatile ("decl %%gs:%P0"
 402                         : /* no outputs */
 403                         : "i" (offsetof(cpu_data_t, cpu_preemption_level))
 404                         : "cc", "memory");
 405 #endif
 406 }
 407
 408 static inline void
 409 mp_disable_preemption(void)
 410 {
 411         disable_preemption();
 412 }
 413
 414 static inline void
 415 mp_enable_preemption(void)
 416 {
 417         enable_preemption();
 418 }
 419
 420 static inline void
 421 mp_enable_preemption_no_check(void)
 422 {
 423         enable_preemption_no_check();
 424 }
 425
 426 static inline cpu_data_t *
 427 current_cpu_datap(void)
 428 {
 429         CPU_DATA_GET(cpu_this, cpu_data_t *);
 430 }
 431
 432 static inline cpu_data_t *
 433 cpu_datap(int cpu)
 434 {
 435         return cpu_data_ptr[cpu];
 436 }
 437
 438 extern cpu_data_t *cpu_data_alloc(boolean_t is_boot_cpu);
 439 extern void cpu_data_realloc(void);
 440
 441 #endif  /* I386_CPU_DATA */